Electric and pneumatic governor.



, W. K. RANKIN. l BLEGTBIU AND PNEUMATIG GOVERNOR. APIELIOATIO FILED HAY 22, 1807. BENEWED AUG. 6,1908.

915,1 12.. Patntea Mar. 16,1909.

nvenor wnsac. y l y MWh/f Bamm-n W. K. RANKIN.

. ELECTRIC AND PNEUMATIG GOVERNOR, APPLIUATION TILED MAY 22, 1907. .EENEWBD AUG, 6,1908.

i. illo 1 K. RANKiN, 0F PHILADELPHIA, PENNSYLV.;

YA. ASSIGNOR TG JOHN E. REYB'CRN,

OF PHLABELPHIA, lENNSYLi'liHA.

EL'GTRC [lill'lll PNEUMATIC GOVERNGR;

eisgiie.

Specification o Letters Patent.

Patented March l, 1909.

lppication filed Moy 22, w97. Serial No. 37504:?. Renewed August 6, M908. Serial No. 447,323.

To oli whom. it 'mcg/-cw/.cern

Beit known that l, lil'iLiliAii lil. liismim, ny citizen oi llie United rjtotes, residing This governor is for the control of mi lo electric oir compressor` by the action ot' tlie pressure ivitliin an air reservoir whichM -When the pressure lies been reduced to en allowed minimum, automatically forms o circuit to lie compressoi"s motor to increase l5 the pressure to on allowed maximum., which thon brooks the circuit, unil stops the motor until the pressure lies again decreased to en. .fillowed minimum. The-governor is thus controlled by Clie pressure in the reser E' Voir between e ''ied maximum and miniu mum amount. Moens provillefl Where lof; dolore il'. degrees of extreme pressures niey 'be lied by s. cile-inge of attachments requiring onljg :i 'slight manipulation, and there is also n ineens to correct any inequalities in the resilient means employed. for tile operation of tile swi'lmli1 eil of which ere more fully set ilortli in the specification.

The mechanism is illustrated 'in `the accompenying i'ewwings wherein the seme chaire@H ters oi reference indicate the seme parte throughout the views.

igure is side elevation, with the cover ciieinier removed and the top to the oil 3o cover mostly in section. Fig'. 2 is e central "vertical section on iin-e if "iig, Fig. i is e, 'l'. i" View with the top cover removed.

iiig, l c, seccion on line )l X Fig. l looking in the direction oi arrow A. is also e r sect-ion on line l X Fig. l looking in the alirefi'cn oi" arrow Fig. 6 is e tracfmenn zierg, w snowing position oi ports conooi/eli to the "si-'titoli binde when the circuit is breiten,

l c is sii-ing if 'Jing 3, with `fit-licor `'crews .15 .liu-t the tension egeinst ,ver et the opposite enel oi: the I liioii is io. Contact with diaphragm fi Si?? with the nir resw'foir (not shown). v ine motel lent oi'ioilower E, eno'. Giambi-ogm ledelpliiefin 'tile county oi' Phileclclioliiu Stolze or" Pennsyl fonia, lieve invented f l Tto coso l.. 'By tl'ie tension pnl on spring E diaphragm and in the oir bami; is obtained.

' i-lttnclieri to 'follower 6 there is e rod l2 l which passes outward7 through, nml iieyonf sont l, with its outer end bilurczitefl to re l ceive o lever 13 piioteil zit 14 to e lug l5 ol cese l. Above spring pocket E there is o recess 16, across which there is e shaft 17 whichl extends Within the oil receptacle i8, it lies e i coller 19 and e square inner end 2l). in recess 16 en erin 2l is efljustably secured. to slie'it 17 by e screw 212, tlie outer end of the erm is bifurcatoi'l, and e pivot 2S secures thereto 2. rod 34, outwardly extomiling and freely guided through spring soot 25;,21. spring 2G is placed around. rod 24, .between scot 25 and a. coller 27 ol rod 24. The spring,v seat 25 is pivot-Lilly supported between arms .28 which ere rotatably j ournnled. on shalt i7. Arms have extensions 2Q wherein ere holes 30, 3l, 32 to receive a pin for the ettoclinient o1 bifurcations 34 of reecil rofl 35 with jews adopted. for attachment to oliepliregin lever 13.

@Within oil receptaclel 1S, end securedL to the square part 2O of slieit i7 there is on .insulated switch blade 37 having e removably secured Contact 38 end e yielding copper ril)- bon conductor 3S' toeu terminal 39 of the incoming conductor 40. Opposite the blade there is e terminal for the outgoing conductor comprising u beso pinto 42 with ne taclied fingers' 43 of thin yielding copper plates, seperated ivy pieces 44 from :in inter posed live-stop 45 against which. contact 3H eliuts, and renewable contacts o 'lor iingers 43.

The oil receptacle 18 has o. removable cover 47 ond o coni-prossimo gasket 4&4. A ooss i9 above-receptacle 18 receives o ventiW lotor 5G with e passage 5i from the receptacle with outlets 52 to the atmosphere. A removable cover 53 incloses the Working part-s exterior to' the Aoil receptacle.

The operation is es follows; es illustrated in F l., 2, 3, the Working ports.

phragm .7 forces follower 6 and its rod l2 t( nieve lever i3 and cause it, throu h its connections to pull down 'the rotatab e arms 28 which move in a patio, eccentric to pivot 23, causing the compression oie. spring 26 until the spring tlie dead center of ann 21 when the spring expands and pushes up 'arm 2i and tiiroofrnshat t7 carries blade 37 back against dea stop 5e, breaking the circuit and stopping the motor-compressor, with the s ring, its arm and movable arts as seen in ig. 6. As tlie pressure in t e reservoir de creases the movements just described Will be reversed and the circuit will again be formed, with the parts as seen in Fig. i. in 33 is attached through holes 30 in extensions 29, which aliow for a movement of the arts for a variation ci ten pounds pressure lbetween maximum and minimum against diaphragm 'I and in the reservoir, Whilel'ioles 3l, 32 will permit a variation of E3 and l5 pounds reJ spectively. To compensate for the inequalities of springs 26, or variations in set or resiliency,'the stop 54 is adjustably attached with its Side 55 nearest the center of attachment, and sides 56, 57, 58 each in succession more remote, so that by turning the stop the movement of blade 37 may be limited to suit the power of the spring, which is preferable to replacing the spring.

l claim.

In an eiectric and pneumatic governor, a iuid pressure diaphragm, a switch blade and electrical connections thereto; a terminal ada ted for engagement by the binde, and a conductor therefrom; a shaft Wbereto the blade is attached, `an arin axedto the shaft and coperatine with the blade, a spring' pivotall attached to the arm, extending out- War ly therefrom, and its outer end seated upon a pivotaliy supported guide; rotatable arms supporting' the guide, extensions from ythe arms Witli interchangeable means for at# taching the means operative by the' `diaphragm and whereby upon the accumulation of, an excess lof pressure, or thedecrease ci pressure, within fixed limits, the outer end ci' the spring` is moved eccentric to its pivotal connection to the arm aforesaid, Wliereby to force the movement of the arm and blade. as the alinement of the slia'ftv and Spring pivot are passed.

In testimony whereof I affix my signature in presence ci t'Wo Witnesses.

WrLLiAivi it. RANKiN.

Witnesses LEWIS H. REDNER. RANsoiwr C. VVnrGi-IT. 

